Invalid backbuffer formats
Author
I'm receiving this warning:
Direct3D9: (WARN) :Invalid backbuffer format specified
When calling Direct3D->CheckDeviceType() with certain formats. Does this warning mean my video card or hardware does not support the format or does the warning mean that the format is always invalid? I don't understand why Direct3D would warn me if I'm checking a format and it fails. That's why I was checking it [smile]
Here are the formats I check, and I get three of the above warnings: D3DFMT_R8G8B8 (24 bit), D3DFMT_X8R8G8B8 (32 bit), D3DFMT_R5G6B5 (16 bit), D3DFMT_X1R5G5B5 (alt 16 bit), D3DFMT_P8 (8 bit), D3DFMT_L8 (greyscale).
Thanks for your time
If only people read the documentation...
The previous link lists the valid backbuffer formats. P8 and L8 aren't.
The previous link lists the valid backbuffer formats. P8 and L8 aren't.
Author
Quote:Original post by Coder
If only people read the documentation...
The previous link lists the valid backbuffer formats. P8 and L8 aren't.
I read the documentation quite a lot, but I missed that little list. I appreciate the slap in the face [smile]
So Direct3D only supports 16 or 32 bit screen formats? That's strange. Some older cards only run in 24-bit mode.
Thats weird (about the missing D3DMT_R8G8B8 format). Looks like DX9 cards are not allowed to provide that format for the backbuffer anymore.
I remember testing on a laptop only able to do hardware acceleration in fullscreen 24 bit, nothing else.
Well, it's not really going to be missed, 24 bit is a hassle.
I remember testing on a laptop only able to do hardware acceleration in fullscreen 24 bit, nothing else.
Well, it's not really going to be missed, 24 bit is a hassle.
Author
Quote:Original post by Endurion
I remember testing on a laptop only able to do hardware acceleration in fullscreen 24 bit, nothing else.
Heh, my laptop was exactly why I was bringing it up [smile]
Quote:Original post by JiiaQuote:Original post by Endurion
I remember testing on a laptop only able to do hardware acceleration in fullscreen 24 bit, nothing else.
Heh, my laptop was exactly why I was bringing it up [smile]
I believe it was allowed in D3D8. Either that, or it's a D3D9 documentation bug. I used to use R8G8B8 on my S3 Virge, back when I was learning Direct3D...(I don't use the card anymore, honest!)
Author
It was one of the formats that reported an invalid error, so it must not be a documentation bug. It's just not supported. Maybe the API will provide 32 bit emulation for 24 bit cards.
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